/*

    {
        "t":"GUILD_SCHEDULED_EVENT_USER_ADD",
        "s":10,
        "op":0,
        "d":{
            "user_id":"747931819407835176",
            "response":1,
            "guild_scheduled_event_id":"1185590018027303013",
            "guild_id":"854735915313659944"
        }
    }

*/